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分析了防汛指挥系统中水情信息采集系统的可靠性,并从理论上对描述水情信息采集系统模型的可靠性有关特征量参数进行了推导,最后得出了定量分析水情信息采集系统可靠性的方法和结论性公式。 相似文献
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营口地区河流众多,如何有效监测河道流量和水库进出水量已成为亟待解决的课题。根据营口辽河防洪自动监测系统的发展现状,采用信息采集层、数据传输层和系统应用层的三层体系结构设计整个系统,建立一套完整的辽河实时防洪监测系统,利用传感器节点将其分布到辽河监测断面,为了实现对辽河水位、流量等全方位跟踪监测,实时跟踪记录辽河水位、流量等数据,这样不仅有利于辽河汛期水情的24 h不间断监测,从而解放大部分劳动力,使得建立防洪指挥体系尤为重要。 相似文献
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碧口水电厂短波,超短波水情自动测报混合系统的建设和经验 总被引:1,自引:0,他引:1
碧口水电厂水情自动测报系统,是一个短波1:8和超短波1:2的混合体制的水情自动测报系统。实践证明,以短波电台组网的水情自动测报系统,由于在抗干扰和测报格式方面采用了多种技术措施,使短波通信畅通率大为提高,满足了水情自动测报的要求。 相似文献
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我国水文情报预报工作的主要成就及展望 总被引:2,自引:2,他引:0
新中国成立50年来,水文情报预报工作取得了成就,在水情信息采集和传输方面,全国已有水文报汛站8000余处,在25处重点防洪河段和150座大型水库上建立了水文自动测报系统,共计有遥测站近2000个,已有22个省(市,区)和7个流域管理机构的水情部门通过计算机广域网互传水情信息。在水文预报技术方面,开发研制了适合中国特色的许多水文模型。随着计算机的广泛应用,水利信息中心初步建立了水雨情信息服务系统,包 相似文献
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本文介绍了MSP430单片机的特点,从四个方面对其设计原理进行了描述,并对采集仪可靠性设计进行了介绍。基于MSP430的优点,采用超低功耗的MSP430单片机研制的水情信息采集仪,将具有良好的应用前景。 相似文献
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通过分析常规报汛存在的问题、防汛指挥系统的设计思路,总结中国水文自动测报系统的技术发展现状,提出了国家防汛指挥系统水情分中心建设中的通信信道、测报方式、信息传输格式、水文资料收集、传感器和电源等设计方案选择建议,并以MOTOROLA遥测、遥控技术为例介绍了国外水文自动测报系统中采用的先进技术。 相似文献
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主要介绍了GIS和决策支持在海洋石油开发船舶监控与调度领域的应用,结合GPS卫星定位技术、GSM全球移动通讯技术、GIS地理信息技术及计算机网络通信与数据处理技术,设计实现了一套远程监控调度决策系统。系统包括油轮实时监控和生产调度决策二个子系统,这里分别从硬件和软件二个角度对系统进行了描述,并对生产调度决策支持的简单设计模式进行了论述。实际运用证明,该系统能够较好的解决在海洋石油开采中,石油运输所存在的部分问题。 相似文献
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The potential of grey self-memory model (GSM), radial basis function network (RBF), and adaptive neuro fuzzy inference system (ANFIS) models in forecasting groundwater depths over an unconfined aquifer was compared. GSM, RBF, and ANFIS modeling was carried out at five sites in Jilin City, northeastern China, considering the influential lags of monthly groundwater depth as the inputs. The performance of the models was evaluated using criteria standards (R, RMSE, MARE, NS) and graphical indicators. Results indicate that the performance of all models was satisfactory in the region which lack of hydro-meteorological data. Comparison of the goodness-of-fit statistics in the research indicated that ANFIS was the better technique than the other two at all the sites except for J21, and GSM(1,1) was the worst model at all the sites. However, considering the practical advantages of GSM(1,1) technique, it was recommended as an alternative and cost-effective groundwater modeling tool. Meanwhile, it was found that the modeling prediction for the well with the stable and evenly distributed data series has more accurate fitting results, generally. 相似文献
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文章介绍了一种多参数水质监测系统。该系统可以同时监测水位、水温、pH值、溶解氧、氧化还原电位、电导率、氨氮、氯离子等8个参数,包括三部分:监测系统主机(地下水水质监测系统)、地面仪器(GSM通讯系统)和室内终端接收系统,监测到的数据可以通过GSM公共服务网无线传输。其中重点介绍了以MSC1210Y5为核心的主机系统以及在开发调试中需注意的问题。MSC1210系列芯片是美国德州仪器公司新近推出的一种功能很强的带24位A/D转换器的微处理器芯片,其一些增强特性适合在测量精度要求高、输出信号微弱的场合使用。以该芯片为核心的多参数水质监测系统具有结构紧凑、功耗低等特点,适合野外长期观测的需要。 相似文献
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GPS技术、WebGIS技术和GPRS/GSM技术的有机结合,为移动目标进行远程监控调度提供了手段。为实现对物流运输公司的车辆进行实时监控,设计并实现了基于MS4W和GPRS/GSM的车辆综合监控系统一系统涉及用于获取车辆GPS定位数据的通讯工作站、基于B/S四层模式的Web车辆监控平台等关键技术。实现的系统已经应用于上海多家物流运输公司,均取得良好效果,结果表明,系统具有实用性、安全性、可靠性和实时性,可以有效远程监控所有在GSM网覆盖范围内的移动目标:本文主要介绍该系统的总体设计思想、系统功能、关键技术和应用实例. 相似文献
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Delineation of fluvial sediment architecture of subalpine riverine systems using noninvasive hydrogeophysical methods 总被引:2,自引:2,他引:0
Daniel Altdorff Jannis Epting Jan van der Kruk Peter Dietrich Peter Huggenberger 《Environmental Earth Sciences》2013,69(2):633-644
River management and restoration measures are of increasing importance for integrated water resources management (IWRM) as well as for ecosystem services. However, often river management mainly considers engineering and construction aspects only and the hydrogeological settings as the properties and functions of ancient fluvial systems are neglected which often do not lead to the desired outcome. Knowledge of the distribution of sediment units could contribute to a more efficient restoration. In this study, we present two noninvasive approaches for delineation of fluvial sediment architecture that can form a basis for the restoration, particularly in areas where site disturbance is not permitted. We investigate the floodplain of a heavily modified low-mountain river in Switzerland using different hydrogeophysical methods. In the first approach, we use data from electromagnetic induction (EMI) with four different integral depths (0.75–6 m) and gamma-spectrometry as well as the elevation data as input for a K-means cluster algorithm. The generated cluster map of the surface combines the main characteristics from multilayered input data and delineates areas of varying soil properties. The resulting map provides an indication of areas with different sedimentary units. In the second approach, we develop a new iterative method for the generation of a geological structure model (GSM) by means of various EMI forward models. We vary the geological input parameters based on the measured data until the predicted EMI maps match the measured EMI values. Subsequently, we use the best matched input data for the GSM generation. The derived GSM provides a 3D delineation of possible ancient stream courses. A comparison with an independent ground penetrating radar (GPR) profile confirmed the delineations on the cluster map as well as the vertical changes of the GSM qualitatively. Thus, each of the approaches had the capacity for detecting sedimentary units with distinct hydraulic properties as an indication of former stream courses. The developed methodology presents a promising tool for the characterization of test sites with no additional subsurface information. 相似文献
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基于类Twitter服务的低成本近实时野外监测数据获取系统 总被引:1,自引:1,他引:0
野外实时数据对于研究和预报工作越来越重要,传统的有线、无线或者混合数据传输方案往往建设难度大、成本高,且需处理数据冗余、信息纠错和信息干扰等实际问题.实验基于当前流行的类Twitter网络服务和GSM短信息服务,提出了一套基于无线短信的满足近实时数据获取要求的水文野外数据获取系统,并对其进行初步试验.方案具有低成本、高效率、构建灵活快速等特点,可以被广泛应用于近实时、保密性要求低的科研生产领域数据采集业务. 相似文献
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Stratimagic地震相分析技术在川中GSM油气勘探中的应用 总被引:1,自引:0,他引:1
通过Stratimagic地震相分析技术的应用,明确了该区多种类型河道的沉积模式,预测了砂体的展布,对于四川盆地浅层砂岩油气勘探具有重要指导意义。 相似文献